i Register
In some senses, hypercaffeinated is marked as informal. Watch for register when choosing this word.
adj
Intensely peppy and energetic, as after consuming large amounts of caffeine.
And not surprisingly, “America’s Election HQ” comes with Fox News topspin: the tone is hypercaffeinated and fervid, and Ms. Kelly, who is the alpha host, has a gleam of zeal in her eyes that last week drove even Karl Rove, a Fox News contributor, to defend Mrs. Clinton.
Containing too much caffeine.